Nginx + unicorn 运行多个Rails应用程序

PS：第一次写的很详细，可惜发布失败，然后全没了，这是第二次，表示只贴代码，剩下的自己领悟好了，这就是所谓的一鼓作气再而衰吧，希望没有第三次。

版本：

　　ruby 2.1.0

　　rails 4.0.2

　　nginx 1.5.8 mainline version

　　unicorn 4.7.0

/usr/local/nginx/conf/nginx.conf

 user NginxUser NginxGroup;
 worker_processes  ;

 events {
     worker_connections  ;
 }

 http {
     include       mime.types;
     include       /usr/local/nginx/conf/conf.d/*.conf;
     default_type  application/octet-stream;

     sendfile        on;
     #tcp_nopush     on;

     keepalive_timeout  65;

     gzip  on;
 }

/usr/local/nginx/conf/conf.d/guorj.conf

 upstream guorj_rails_unicorn_server {
   server unix:/tmp/guorj_unicorn.sock fail_timeout=;
   #server 127.0.0.1: fail_timeout=;
 }
 server {
   listen ;
   client_max_body_size 4G;
   server_name          guorj.com;
   keepalive_timeout    ;
   root                 /home/NginxUser/www/guorj/public;
   access_log           /home/NginxUser/www/guorj/log/nginx_access.log;
   error_log            /home/NginxUser/www/guorj/log/nginx_error.log;
   rewrite_log          on;
   index                index.html;

   location / {
     proxy_set_header Host $host;
     proxy_set_header X-Forwarded-Host $host;
     proxy_set_header X-Real-IP $remote_addr;
     proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
     proxy_buffering  on;
     proxy_redirect   off;
     proxy_pass       http://guorj_rails_unicorn_server;
   }
   #Rails error pages
   location =/.html {
     root /home/NginxUser/www/guorj/public;
   }
 }

/home/NginxUser/www/guorj/config/unicorn.rb

 # Sample verbose configuration file for Unicorn (not Rack)
 #
 # This configuration file documents many features of Unicorn
 # that may not be needed for some applications. See
 # http://unicorn.bogomips.org/examples/unicorn.conf.minimal.rb
 # for a much simpler configuration file.
 #
 # See http://unicorn.bogomips.org/Unicorn/Configurator.html for complete
 # documentation.
 # can't specify rails env
 rails_env = ENV["RAILS_ENV"] || "production"

 # Use at least one worker per core if you're on a dedicated server,
 # more will usually help for _short_ waits on databases/caches.
 worker_processes 4

 # Since Unicorn is never exposed to outside clients, it does not need to
 # run on the standard HTTP port (80), there is no reason to start Unicorn
 # as root unless it's from system init scripts.
 # If running the master process as root and the workers as an unprivileged
 # user, do this to switch euid/egid in the workers (also chowns logs):
 # user "unprivileged_user", "unprivileged_group"

 # Help ensure your application will always spawn in the symlinked
 # "current" directory that Capistrano sets up.

 app_root = File.expand_path('.')

 working_directory app_root #"/path/to/app/current" # available in 0.94.0+

 # listen on both a Unix domain socket and a TCP port,
 # we use a shorter backlog for quicker failover when busy
 #listen "/path/to/.unicorn.sock", :backlog => 64
 #listen "#{app_root}/tmp/sockets/unicorn.sock", :backlog => 64
 listen "/tmp/guorj_unicorn.sock", :backlog => 64
 listen 8081, :tcp_nopush => false # true

 # nuke workers after 30 seconds instead of 60 seconds (the default)
 timeout 120 #

 # feel free to point this anywhere accessible on the filesystem
 #pid "/path/to/app/shared/pids/unicorn.pid"
 #pid "#{app_root}/tmp/pids/unicorn.pid"
 pid "/tmp/guorj_unicorn.pid"

 # By default, the Unicorn logger will write to stderr.
 # Additionally, ome applications/frameworks log to stderr or stdout,
 # so prevent them from going to /dev/null when daemonized here:
 #stderr_path "/path/to/app/shared/log/unicorn.stderr.log"
 #stdout_path "/path/to/app/shared/log/unicorn.stdout.log"
 stderr_path "#{app_root}/log/unicorn.stderr.log"
 stdout_path "#{app_root}/log/unicorn.stdout.log"

 # combine Ruby 2.0.0dev or REE with "preload_app true" for memory savings
 # http://rubyenterpriseedition.com/faq.html#adapt_apps_for_cow
 preload_app true
 GC.respond_to?(:copy_on_write_friendly=) and
   GC.copy_on_write_friendly = true

 # Enable this flag to have unicorn test client connections by writing the
 # beginning of the HTTP headers before calling the application.  This
 # prevents calling the application for connections that have disconnected
 # while queued.  This is only guaranteed to detect clients on the same
 # host unicorn runs on, and unlikely to detect disconnects even on a
 # fast LAN.
 # check_client_connection false

 before_fork do |server, worker|
   # the following is highly recomended for Rails + "preload_app true"
   # as there's no need for the master process to hold a connection
   defined?(ActiveRecord::Base) and
     ActiveRecord::Base.connection.disconnect!

   # The following is only recommended for memory/DB-constrained
   # installations.  It is not needed if your system can house
   # twice as many worker_processes as you have configured.
   #
   # # This allows a new master process to incrementally
   # # phase out the old master process with SIGTTOU to avoid a
   # # thundering herd (especially in the "preload_app false" case)
   # # when doing a transparent upgrade.  The last worker spawned
   # # will then kill off the old master process with a SIGQUIT.
    old_pid = "#{server.config[:pid]}.oldbin"
    if old_pid != server.pid
      begin
        sig = (worker.nr + 1) >= server.worker_processes ? :QUIT : :TTOU
        Process.kill(sig, File.read(old_pid).to_i)
      rescue Errno::ENOENT, Errno::ESRCH
      end
    end
   #
   # Throttle the master from forking too quickly by sleeping.  Due
   # to the implementation of standard Unix signal handlers, this
   # helps (but does not completely) prevent identical, repeated signals
   # from being lost when the receiving process is busy.
    sleep 1
 end

 after_fork do |server, worker|
   # per-process listener ports for debugging/admin/migrations
   # addr = "127.0.0.1:#{9293 + worker.nr}"
   # server.listen(addr, :tries => -1, :delay => 5, :tcp_nopush => true)

   # the following is *required* for Rails + "preload_app true",
   defined?(ActiveRecord::Base) and
     ActiveRecord::Base.establish_connection

   # if preload_app is true, then you may also want to check and
   # restart any other shared sockets/descriptors such as Memcached,
   # and Redis.  TokyoCabinet file handles are safe to reuse
   # between any number of forked children (assuming your kernel
   # correctly implements pread()/pwrite() system calls)
 end

然后运行unicorn

unicorn_rails -c /home/NginxUser/www/guorj/config/unicorn.rb -E production -D 

添加第二个rails项目（请自行和第一个项目的配置对比不同，被网速把激情磨灭了）

/usr/local/nginx/conf/conf.d/wguorj.conf

 upstream wguorj_rails_unicorn_server {
   server unix:/tmp/wguorj_unicorn.sock fail_timeout=;
   #server 127.0.0.1: fail_timeout=;
 }
 server {
   listen ;
   client_max_body_size 4G;
   server_name          www.guorj.com;
   keepalive_timeout    ;
   root                 /home/NginxUser/www/wguorj/public;
   access_log           /home/NginxUser/www/wguorj/log/nginx_access.log;
   error_log            /home/NginxUser/www/wguorj/log/nginx_error.log;
   rewrite_log          on;
   index                index.html;

   location / {
     proxy_set_header Host $host;
     proxy_set_header X-Forwarded-Host $host;
     proxy_set_header X-Real-IP $remote_addr;
     proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
     proxy_buffering  on;
     proxy_redirect   off;
     proxy_pass       http://wguorj_rails_unicorn_server;
   }
   #Rails error pages
   location =/.html {
     root /home/NginxUser/www/wguorj/public;
   }
 }

/home/NginxUser/www/wguorj/config/unicorn.rb

 # Sample verbose configuration file for Unicorn (not Rack)
 #
 # This configuration file documents many features of Unicorn
 # that may not be needed for some applications. See
 # http://unicorn.bogomips.org/examples/unicorn.conf.minimal.rb
 # for a much simpler configuration file.
 #
 # See http://unicorn.bogomips.org/Unicorn/Configurator.html for complete
 # documentation.
 # can't specify rails env
 rails_env = ENV["RAILS_ENV"] || "production"

 # Use at least one worker per core if you're on a dedicated server,
 # more will usually help for _short_ waits on databases/caches.
 worker_processes 4

 # Since Unicorn is never exposed to outside clients, it does not need to
 # run on the standard HTTP port (80), there is no reason to start Unicorn
 # as root unless it's from system init scripts.
 # If running the master process as root and the workers as an unprivileged
 # user, do this to switch euid/egid in the workers (also chowns logs):
 # user "unprivileged_user", "unprivileged_group"

 # Help ensure your application will always spawn in the symlinked
 # "current" directory that Capistrano sets up.

 app_root = File.expand_path('.')

 working_directory app_root #"/path/to/app/current" # available in 0.94.0+

 # listen on both a Unix domain socket and a TCP port,
 # we use a shorter backlog for quicker failover when busy
 #listen "/path/to/.unicorn.sock", :backlog => 64
 #listen "#{app_root}/tmp/sockets/unicorn.sock", :backlog => 64
 listen "/tmp/wguorj_unicorn.sock", :backlog => 64
 listen 8082, :tcp_nopush => false # true

 # nuke workers after 30 seconds instead of 60 seconds (the default)
 timeout 120 #

 # feel free to point this anywhere accessible on the filesystem
 #pid "/path/to/app/shared/pids/unicorn.pid"
 #pid "#{app_root}/tmp/pids/unicorn.pid"
 pid "/tmp/wguorj_unicorn.pid"

 # By default, the Unicorn logger will write to stderr.
 # Additionally, ome applications/frameworks log to stderr or stdout,
 # so prevent them from going to /dev/null when daemonized here:
 #stderr_path "/path/to/app/shared/log/unicorn.stderr.log"
 #stdout_path "/path/to/app/shared/log/unicorn.stdout.log"
 stderr_path "#{app_root}/log/unicorn.stderr.log"
 stdout_path "#{app_root}/log/unicorn.stdout.log"

 # combine Ruby 2.0.0dev or REE with "preload_app true" for memory savings
 # http://rubyenterpriseedition.com/faq.html#adapt_apps_for_cow
 preload_app true
 GC.respond_to?(:copy_on_write_friendly=) and
   GC.copy_on_write_friendly = true

 # Enable this flag to have unicorn test client connections by writing the
 # beginning of the HTTP headers before calling the application.  This
 # prevents calling the application for connections that have disconnected
 # while queued.  This is only guaranteed to detect clients on the same
 # host unicorn runs on, and unlikely to detect disconnects even on a
 # fast LAN.
 # check_client_connection false

 before_fork do |server, worker|
   # the following is highly recomended for Rails + "preload_app true"
   # as there's no need for the master process to hold a connection
   defined?(ActiveRecord::Base) and
     ActiveRecord::Base.connection.disconnect!

   # The following is only recommended for memory/DB-constrained
   # installations.  It is not needed if your system can house
   # twice as many worker_processes as you have configured.
   #
   # # This allows a new master process to incrementally
   # # phase out the old master process with SIGTTOU to avoid a
   # # thundering herd (especially in the "preload_app false" case)
   # # when doing a transparent upgrade.  The last worker spawned
   # # will then kill off the old master process with a SIGQUIT.
    old_pid = "#{server.config[:pid]}.oldbin"
    if old_pid != server.pid
      begin
        sig = (worker.nr + 1) >= server.worker_processes ? :QUIT : :TTOU
        Process.kill(sig, File.read(old_pid).to_i)
      rescue Errno::ENOENT, Errno::ESRCH
      end
    end
   #
   # Throttle the master from forking too quickly by sleeping.  Due
   # to the implementation of standard Unix signal handlers, this
   # helps (but does not completely) prevent identical, repeated signals
   # from being lost when the receiving process is busy.
    sleep 1
 end

 after_fork do |server, worker|
   # per-process listener ports for debugging/admin/migrations
   # addr = "127.0.0.1:#{9293 + worker.nr}"
   # server.listen(addr, :tries => -1, :delay => 5, :tcp_nopush => true)

   # the following is *required* for Rails + "preload_app true",
   defined?(ActiveRecord::Base) and
     ActiveRecord::Base.establish_connection

   # if preload_app is true, then you may also want to check and
   # restart any other shared sockets/descriptors such as Memcached,
   # and Redis.  TokyoCabinet file handles are safe to reuse
   # between any number of forked children (assuming your kernel
   # correctly implements pread()/pwrite() system calls)
 end

运行第二个rails程序 记得重启nginx

unicorn_rails -c /home/NginxUser/www/wguorj/config/unicorn.rb -E production -D

相关参考资料

求 Nginx + Unicorn 部署 Rails 完整配置 http://ruby-china.org/topics/471

https://github.com/huacnlee/ruby-china/blob/master/config/unicorn.rb

https://raw.github.com/defunkt/unicorn/master/examples/unicorn.conf.rb

unicorn官网：http://unicorn.bogomips.org/

http://ruby-china.org/topics/10895

Nginx+Unicorn+rails多项目 http://chinacheng.iteye.com/blog/757638

Ruby-China.org 选择用 Thin 还是 Unicorn? http://ruby-china.org/topics/35

使用Unicorn替代Mongrel作为Ruby on Rails的服务器 http://www.cslog.cn/Content/unicorn-for-ruby-on-rails/

貌似要先启动nginx 然后再启动所有的unicorn 否则会有问题 不知道是不是真的 再继续观察

touch /tmp/restart.txt 重启当前的Rails项目 http://ruby-china.org/topics/1374

touch tmp/restart.txt
其实也能实现优雅的重启 Unicorn 进程。http://ruby-china.org/topics/35#reply32

注运行两个rails项目的进程

[root@GrjServer guorj]# ps aux | grep nginx
root        0.0  0.2     ?        Ss   :   : nginx: master process /usr/local/nginx/sbin/nginx
         0.0  0.3     ?        S    :   : nginx: worker process
root        0.0  0.1     pts/    S+   :   : grep nginx
[root@GrjServer guorj]# ps aux | grep unicorn
root        0.0 12.5   ?        Sl   :   : unicorn_rails master -c /home/NginxUser/www/guorj/config/unicorn.rb -E production -D
root        0.0 12.3   ?        Sl   :   : unicorn_rails worker[] -c /home/NginxUser/www/guorj/config/unicorn.rb -E production -D
root        0.0 12.3   ?        Sl   :   : unicorn_rails worker[] -c /home/NginxUser/www/guorj/config/unicorn.rb -E production -D
root        0.0 12.3   ?        Sl   :   : unicorn_rails worker[] -c /home/NginxUser/www/guorj/config/unicorn.rb -E production -D
root        0.0 12.3   ?        Sl   :   : unicorn_rails worker[] -c /home/NginxUser/www/guorj/config/unicorn.rb -E production -D
root        1.2 12.5   ?        Sl   :   : unicorn_rails master -c /home/NginxUser/www/wguorj/config/unicorn.rb -E production -D
root        0.0 12.3   ?        Sl   :   : unicorn_rails worker[] -c /home/NginxUser/www/wguorj/config/unicorn.rb -E production -D
root        0.0 12.3   ?        Sl   :   : unicorn_rails worker[] -c /home/NginxUser/www/wguorj/config/unicorn.rb -E production -D
root        0.0 12.3   ?        Sl   :   : unicorn_rails worker[] -c /home/NginxUser/www/wguorj/config/unicorn.rb -E production -D
root        0.0 12.3   ?        Sl   :   : unicorn_rails worker[] -c /home/NginxUser/www/wguorj/config/unicorn.rb -E production -D
root        0.0  0.1     pts/    S+   :   : grep unicorn
[root@GrjServer guorj]#